Drill-forming die.



O. C. JULIEN.

DRILL FORMING DIE.

APPLICATION FILED APR.26. 1916..

tented June 19 1917 3 SHEETS-SHEET I OscaFz C. JULIEN OSCAR C. JULIEN, OF MONTREAL, WISCONSIN.

DRILL-FORMING DIE.

Application filed April 26,

To all whom it may concern: I

Be it known that I, Oscar: C. JULIEN, a citizen of the United States, residing at Montreal, in the county of Iron and State of lVisconsin, have invented certain new and useful Improvements in Drill-Forming Dies, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to machines for forging and sharpening rock drills and other drill bits, and particularly to those machines which have vertically operating clamping dies and a horizontally operating upsetting hammer, such machines, for instance, as the Sullivan drill sharpening machine, whose construction is illustrated in the Patent No. 1,123,372, granted to T. H. Proske, January 5, 1915, though the invention is not limited to use with this particular machine.

In these machines, a steel rod is automatically upset by the upsetting hammer and forged by vertically operating forging hamniers and dies so as to form a head on the rod, which head, if the work is a drill bit, is formed with sharpened radiating wings. The work of upsetting is done by dollies which receives the impact of a pneumatic hammer, the steel rod being held by.clamping dies during the upsetting process. .The steel rod is upset and then removed from the .clamping dies and disposed beneath the forging dies until the drill is completed. The steel is partially upset by a few rapid blows of the dolly and then the operator, without changing the position, brings the bit under the vertical hammer and here the wings and corners of the bit are drawn out under swaging dies. The bit is thus hammered out alternately under the two hammers until it is upset to the proper gage and shape and the wings, corners and cutting edge drawn out so that. they are uniform and of the right thickness and angle. One dolly is required for each shape and each gage of bit to be made and one set of clamping dies required for each diameter of steel rod.

Now if it be desired to make a bit having a head of a diameter of 211; inches from a steel rod having a diameter of of an inch,

Specification of Letters Patent.

Patented June 19, 1917.

1916. Serial No. 93,755.

it is necessary to start with a dolly of 1% inches in diameter. This in one heat will form a bit having a head of 15} inches in diameter, but in order to increase the diameter of the head it is now necessary to change the dolly and the clamping dies and proceed in this manner by changing the clamping dies and dolly until the complete size has been made. In the example referred to here, this would require four heats and three changes of dollies, and even then a perfect bit could not be made by reason that the steel in the operation bends over to one side of the clamping dies and so causes flaws in the steel.

The general object of my invention is to provide a pair of coacting clamping dies so formed that the steel as it is being upset will be at all times supported against this lateral bending action from the first blow of the dolly until the last, and a further object of this invention is to provide means permitting a relatively large head or bit to be made or upset on a relatively small steel shank without a change of the dollies or clamping dies and at one heat.

A further object of the invention is to provide a very simple clamping die for this purpose which may be used on a large variety of machines working on this principle, which does not require any changes in the machine itself, and which has been found very efiective in practice.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein:

Figure l is a longitudinal section of a drill forming and sharpening machine of the character heretofore referred to;

Fig. 2 is an enlarged vertical section on the line 2-2 of Fig. 1;

Fig. 3 is a fragmentary enlarged top plan view of the cross head 14, the dolly and the dolly operating hammer;

Fig. 4 is a top plan view of the lower section of my improved clamping die;

Fig. 5 is a longitudinal sectional view on the line 55 of Fig. 7 showing the drill supporting jaws in a fully retracted position;

Fig. 6 is a longitudinal sectional view on the line 66 of Fig. 7, showing the drill supporting jaws in a partially retracted position;

Fig. 7 is an end view of the two sections of the clamping die and the jaws;

Fig. 8 is a longitudinal sectional view through one of the drill supporting aws and its section 32;

Fig. 9 is a face view of one of the sleeve sections upon .which the drill supporting jaws are pivoted;

Fig; 10 is a longitudinal sectional view through the clamping die and in the nature of a diagram, showing the position of the parts at the beginning of the drill forming operation;

Fig. 11 is a like view to Fig. 10 and showing the position of the parts when the drill is partly formed;

Fig. 12 is a like view to Fig. ll'but showing the position of the parts when the drill is still further formed;

Fig. 13 is a like view to Figs. 10, 11 and 12, but showing the position of the parts when the drill is fully formed;

Fig. 14 is a section on the line 1414 of Fig. 4;

Fig. 15 is a fragmentary cross section ofthe drill supporting jaws on the line 1515 of Fig. 8;

Fig. 16 is a perspective view of the dolly.

Referring particularly now to Fig. 1, which illustrates the machine to which my invention is applied, 10 designates a base of any suitable character having a bed plate 11 upon which is mounted one half of a clamping die, the half section of the clamping die being designated 26, and mounted on suitable steel rods 13 above the section 26 of the clamping die is a movable cross head 14 carrying the other section 26 of the clamping die. The cross head 14 is moved toward the bed plate by means of a toggle link 15 which is connected to a slidable cross head 16 in turn connected by the members 13 to the cross head 14, the upper end of this toggle link 15 being connected to a slide 17 in turn connected to a piston 18 operating in a chamber 18 this piston being forced forward or rearward by means of compressed air or other suitable motive fluid, the connections, however, for this purpose not being shown. When the piston is forced forward it is obvious that the cross head 16 will be depressed, carrying with it the cross head 14, and that the upper section 26 of the clamping die will be brought down toward and in clamping engagement with the section 26 of the die and in clamping engagement with the rod which may be placed between the sections of the clamping die.

Operating in conjunction with the clamping die sections 26 and 26 is a dolly 19 which is loosely mounted upon a distance piece or rod 20 which in turn receives the impact of a piston-like hammer reciprocating within a cylinder 21 and operated by compressed air. Here again it is not deemed necessary to illustrate the valve mechanism whereby the reciprocation of the piston is secured.

Mounted in advance of the clamping dies and the cross heads are forging dies designated 22 and 24, one of which is fixed upon a suitable anvil 23 in turn fixed to the bed plate of the machine, the other 24 being fixed to a vertically reciprocating hammer 25, the shank of which is connected to any suitable compressed air operating mechanism. The dies 22 and 24 are used for swaging the bit from time to time as will hereafter more fully appear. I have not illustrated the various levers whereby compressed air is admitted to the swaging cylinder and the dolly operating cylinder as these are well known and form no part of my invention. It is suflicient to say that under normal circumstances the steel is placed between the clamping dies, the piston 18 is operated to cause the clamping dies 26 and 26 to approach each other and thus clamp the steel, the hammer 21 is then operated to cause blows to be struck upon the dolly which upsets the steel into the dies 26 and 26 and that in the ordinary operation of this mechanism after some strokes of the dolly upon the steel the clamping die is released and the steel disposed between the swaging dies which are then operated to forge the head which is partly formed upon the end of the steel, and the steel is then placed back in the clamping die and the dolly is again operated.

My invention relates particularly to the peculiar construction of the clamping die wherebv as the steel is being upset the steel that is, as a semi-cylindrical member 26 or 26 having a relatively large head and 'a reduced shank. The interior of the clamping die is chambered, as at 27, this chamber extending from the forward end of the clamping die nearly to the rear end thereof and terminating in a shoulder 28 from which extends a relatively contracted bore 29 which is semi-cylindrical in form or semioctagonal or hexagonal, depending upon the cross section of the steel to be operated on. As illustrated, this bore 29 is semihexagonal. The side wall of the chamber 27 gradually diverges inward from the forward extremity of the die to a point about midway of the chamber 27 and then again 27 has the same diameter as at the mouth of the chamber and from this point 31 to the shoulder 28 the chamber has a diameterthe same as the mouth of the chamber.

Mounted within the chamber 27 are the semi-circular sleeve sections 32 having an exterior diameter approximately equal to that part of the chamber between the numeral 31 and the shoulder 28 and each having a semi-cylindrical recess 33 approxi mately equal in diameter to the bore 29. Hingedly mounted upon each section of the sleeve 32 are the movable aws 34 illustrated in Fig. 7 as two in number, each jaw in cross section being a segment of a circle and the free ends of the jaws being capable of movement outward or inward from or to or toward the axis of the clamping die. The detailed manner in which the jaws 34 are hingedly connected to the sleeve sections 32 will be later described.

Extending longitudinally through each semi-cylindrical die section 26 is a T-shaped slot 35, this slot extending inward from the forward end of the die to a point slightly outward of the shoulder 28 and this'slot intersectingthe wall 30 of the chamber 27 Each section 26 of the sleeve is formed with a radially projecting T-shaped lug 36 which engages in the T-shaped slot 35 and thus the sleeve sections 32 are movable longitudinally of the die sections 26 and held from any rotative movement and also are held centered within the chamber 27, as most clearly shown in Fig. 7. The extremities of the segmental jaws-34 have pivoted thereto T- shaped members 37 which engage in T- shaped slots 38 also formed in the wall of the chamber 27, these slots 38, however, extending inward parallel to the portion a of the wall 30 and terminating slightly beyond the point a of the largest diameter of the chamber 27. It will thus be seen that when the sleeve 32 is disposed so that the ends of the segmental aws are approximately flush with the outer end of the die sections 26 (see Fig. 10). the jaws will be forced inward so that the interior curved faces of the jaws will define a bore approximately of the same diameter as the bore formed by the conjoined recesses 33, but that as the sleeve 32 moves rearward within the chamber 27, the free ends of the segmental jaws 34 will be drawn outward by the engagement of the T- shaped members 37 with the slots 38 and that these jaws will continue to expand as the sleeve and the jaws move inward until eventually the jaws will rest upon the portion I) of the chamber .27 in the position shown in Fig- 13. At this time the sleeve formed of. the two sections 32 will be disposed in the portion d of the chamber' 27.

Each section of die 26 is provided on its base with a bore 39, and a coil spring 40 is disposed in this bore and extends into a socket 41 formed in the inner face of the sleeve or base section 32. Each sleeve or basesection 32 is also provided with a shank 42 which is received in a bore 43 formed in the corresponding die section 26, and the ex tremity of this shank is formed with a notch 44 which is adapted to be engaged by a latch designated generally 45 when the sect-ions32 of the sleeve have been forced rearward sufliciently far so as to bear against the shoulder 28. It will be understood of course that the spring 40 acts to urge its corresponding sleeve section 32 outward so that the jaws are approximately flush with the end of the corresponding die section 26.

The manner in which the aws 34 are pivotally mounted upon the sleeve section 32 is illustratedbest in Figs. 5, 6 and 9. Preferably, the sleeve sections 32 are semi-hexagonal in form, and preferably the jaws 34 are segments of a hexagon adjacent their hinged ends, but are sections of a circle from about the middle of the jaws to the extremities thereof, as this permits a better pivotal or hinged engagement between the jaws and the sleeve sections 32 than would be possible if the sleeve sections 32 were segments of a circle and the jaw sections 34 were also segments of a circle. The outer end of each sleeve section is formed with outwardly extending lugs 46 and between the lugs and on each side of the lugs the end face of the sleeve section is hollowed out at 47. Each jaw 32, as before stated, is segmental in cross section, and preferably the segment is a hexagon adjacent its hinged end, and its inner hinged end is bifurcated or slotted as at 48 to receive the corresponding lug 46, the end wall of this slot being outwardly flared. The inner end face of each jaw is beveled or rounded, as at 49, (see Fig. 6), and the confronting hollowed out face of the sleeve section is correspondingly rounded so that the jaw which is pivoted to the lug 46 by' a pin 50 may swing out against the face I) of the die section 26. The free end of each j aw 34 is formed with a longitudinally extending recess 51 on its outer face which intersects the adjacent end face of the jaw, and pivotally mounted in this recess is the disk-shaped inner end 52 of the corresponding T-shaped keeper or member 37, previously referred to, the head of which engages in the slot 38.

It will thus be seen that if the sleeve sections 32 be forced gradually rearward into the chamber 27, the free ends of the jaws will be gradually drawn radially outward or indivergent relation to each other until eventually the sleeve sections 32 will abut against the shoulder 28 which is the position shown in Fig. 13. This movement of the sleeve sections will of course be resisted by the springs 40. WVhen the sleeve sections have been forced fully inward, each latch or detent 45 will engage with the corresponding notch .14 of the shank 42 and hold the parts in this position until the latches are released. Each latch 45 has a shank 53 which is disposed in the recess 54 formed in the rear end face of the corresponding die section 26, and the shank is guided upon a pin 55. A spring 56 urges the latch toward the bore 43, but the latch may be manually withdrawn from its engagement with the notch 44-, the latch being formed with a finger piece to this end.

Before describing the particular construction at the forward ends of the jaws, it is necessary to describe the dolly used with my construction. The dolly 19, which is illustrated in Fig. 16, has practically the shape of the dolly ordinarily used for forming or sharpening drill bits, and consists of a block of tool steel, square as regards its base 57 but having a central extension 57 which, as illustrated, is cylindrical and has an exterior diameter equal to the di ameter of the chamber 27 at its mouth. The square base is bored to receive the impact transmitting member or rod 20, as shown in Fig. 1. The face of the dolly is formed with intersecting V-shaped grooves 58, or is otherwise shaped to form a proper cutting end face on the steel which is-to form the bit. IVet dollies, that is, those intended to be used for hollow steel are formed as shown in Fig. 16 with a central steel pin 59 which enters the bore of the steel and keeps the bore open. In order to fully support the steel while it is being operated upon by the dolly, I form each jaw 34 at its extremity with an extension 60 triangular in section to fit in one of the triangular grooves 58 and as the jaws expand with the expansion of the steel, these triangular lugs or extensions 60 travel radially outward in the grooves 58 of the dolly.

In order to retract the dolly after the impact of the distance piece or rod 20 thereon, which distance piece in turn receives its impact from a piston-like hammer operating within the chamber-21, there are ordinarily provided .dolly springs having the angular form illustrated in Fig. 3. These dolly springs at their rear ends are connected ordinarily to any fixed portion of the mas chine, the opposite ends of the springs being coiled and then extended at right angles and removably inserted in the dolly. These springs act to retract the dolly after each impact of the distance piece and pre vent the dolly sticking within the opening of the .die. When a new dolly is used, the,

forward ends of the springs are withdrawn from engagement with the old .dolly and the new dolly is put in place and the springs again engaged. In the ordinary dolly, the holes 66' for the reception of the forward ends of the dolly springs are disposed 4 from the rear end of the dolly. In the dolly used with my improved die, the holes are approximately 2 from the rear end of the dolly and hence I can not use the ordinary dolly springs, at least in the position which they ordinarily occupy and, therefore, I pro vide an extra pair of dolly springs desig nated 61 in Fig. 3, the rear ends of which are mounted upon the collars 62, these collars being shiftable upon the longitudinally extending rods 63 which hold the heads of the piston cylinder 22 in place. These rods are not illustrated in Fig. 1 as they are commonly found on this class of drill formers or Sharpeners, but these rods are illustrated in the patent to Proske, 1,123,372, before referred to and are illustrated in Fig. 3 of the annexed drawings. By this construction, I am able to detach the springs 61 from engagement with the dolly 19 and shift the collars 62 and the springs rearward upon the rods 63 so as to get them out of the way so that the regular sprin s may be used with the ordinary dolly and tie,

In order to cover the ends of the slots 35 and 38, I countersink the ends of the die sections 26 and provide a cover plate for each die section designated 67 which cover plate is disposed in this countersink and held in place by screws 68.

In ordinary useand where the steel to be used is hexagon steel of an inch in diameter, the bore 29 of the clamping die 26 is hexagonal in shape and 5 of an inch in diameter when the clamping dies are together. IVhile the bore 33 of the sleeve formed by the sections 32 is one inch in diameter and has a driving fit on the steel, it will of course be obvious that these dies may be varied in internal diameter to suit steel rods having different diameters and that in this case the internal diameter of the sleeve formed of the sections 32 will also be greatly varied.

The operation of this invention is as follows: The steel which is heated to a yellow heat for about six inches from its extremity is placed between the clamping dies 26 and the vise formed by the clamping dies is closed by admitting air behind the piston 18. The steel is thus firmly held with a very great pressure and the clamping die sections thus form a vise holding the steel firmly in place against bodily longitudinal movement under the impact of the dolly. After the clamping dies are set, the steel is partially upset by a few rapid blows of the hammer on the dolly. The dolly. it will be seen,

to upset the end of the steel rod, but it will likewise strike the ends of the jaws 34 so that as the material of the steel rod is forced inward and laterally expanded the jaws will also be forced inward and will be laterally expanded both by reason of the pressure of the expanded metal rod and also by the fact that the members 37 will draw the jaws positively outward by the engagement of these members 37 with the inclined grooves 38. Thus the continual lateral expansion of the metal will be permitted by the continual lateral expansion of the jaws until eventually the sleeve sections 32 will be forced to the rear end of the chamber 27 and against the shoulder 28 when the jaws will have been expanded to their greatest amount and the head of the drill will be formed.

While I have above described the action of the dolly on the steel rod as if this action was continuous until the head of the drill was completely formed, yet in the ordinary operation of forming the head of the bit or drill the steel is alternately submitted to the action of the dolly and the swaging dies 22 and 24. Inasmuch as the form of these swaging dies is well known and their operation well understood, it has not been deemed necessary to illustrate these swaging dies in detail, and it is believed suliicient to say that these swagin dies act to form in the head of the bit t e longitudinally extending V-shaped grooves which define the wings of the bit. Thus in the actual operation of forming a bit after the steel has been partially upset by a few blows of the dolly the clamping dies are opened and the operator brings the partially worked steel under the swaging dies and the swaging dies draw out to a certain extent the wings at the corners of the steel. The steel is then again placed within the dolly and a further operation performed thereon, when it is again placed between the swaging dies, and so on until the steel is upset to form a bit of the proper gage and shape and the wings, corners and cutting edges drawn out so that they are uniform and of the right thickness and angle, it being of course understood that the dolly acts to shape the cutting edges of the wings of the bit.

While I have above described the ordinary operation of forming the bit, as usually practised, it is to be understood that where it is possible my device may be used for forming the head and cutting edges on the steel without alternately submitting the steel to the action of the swaging dies. It is to be noted at this point that the latches 45 act to hold the sleeve sections 32 and the jaws in their final position so that the clamping dies may be removed from the steel, the steel placed beneath the forging dies, and

then the steel replaced within the clamping dies and again operated on by the dolly or without the necessity of reheating the steel, this last action of the dolly being to finish and perfect the bit.

Having described the invention, what I claim is:

1. In a mechanism for upsetting the ends of rods, an angular rod clamping die including members longitudinally movable and coincidently angularly shiftable in relation to the longitudinal axis of the die.

2. In a mechanism for upsetting the ends of rods, a rod clamping die including a sleeve and radially expansible members pivotally mounted on the sleeve and longitudinally movable with the sleeve.

3. In a mechanism for upsetting the ends of rods, a rod clamping die, and means associated with the clamping die for supporting and at all times engaging the side faces of the rod against bending while the rod is being upset, said means being movable radially outward and longitudinally by and with the expansion of the head of the rod as it is being upset.

4. In a mechanism for upsetting the ends of rods, a rod clamping die, and means disposed within the clamping die for supporting the side faces of a rod against bending while the rod is being upset, said means being radially and longitudinally movable.

5. In a mechanism for upsetting the ends of rods, a rod clamping die formed in two coacting sections, a dolly reciprocable into and out of the die and against the head of a rod clamped therein, and means disposed within the rod clamping die for supporting the side faces of the rod and holding the rod against bending while it is being upset, said means being longitudinally movable into the die and radially movable with relation to the rod as the rod is upset.

6. In a mechanism for upsetting the ends of rods, a rod clamping die having a chamber formed therein adapted to receive a reciprocating dolly, means within the clamping die for supporting theside faces of the rod clamped therein and being upset, said means being radially movable into angular relation to the axis of the rod, the wall of the chamber in the die being formed for co; active engagement with and to support said means at all stages of radial outward movement.

7. A. mechanism for upsetting the ends of rods including a rod clamping die having a chamber formed therein, the side walls of which extend divergently inward for a distance and then converge to a diameter equal to that of the opening of the chamber and then extend inward with a uniform diameter, and radial and longitudinal rod supporting members mounted within the chamber and bearing against the walls thereof,

, ameter increased.

8; In a mechanism for upsetting the ends of rods, a clamping die having a chamber formed therein, the side walls of the cham- -ber extending inward divergently for a distanceequal to the upsetting head to be formed on the rod, the walls then converging to a diameter equal to that of the opening ofthe chamberand-then extending inward with a uniform diameter, a sleeve sup- 'ported within the clampin die for longitudinalimovement, and a plurality of rod supporting members pivotallymounted on the sleeve for radial swinging movement.

' 9. In a mechanism for upsetting the ends goOf rods, a rod clamping die having a chamber-formed therein, the sidewalls extending inward divergently for a distance and then converging to a diameter equal to that "ofthe opening. of the chamber and then extending inward with a uniform: diameter,

the side walls of said chamber'being formed with a plurality of longitudinally extending T shap'ed grooves parallel to the axis of the -'die,--and being formed with a plurality of T shaped grooves extending parallel to the --inwardly divergent portion ofnthe chamber,

a sleeve'mounted within the chamber for longitudinal -m0vement therein and having T-shaped 1 lugs" engaging the first-named 5' grooves,* a "plurality *of rod supporting members or jaws pivotally mounted upon the sleeve for radial -movement, and a plura'lity of members pivotally mounted upon said jawmem'bers and having T-sl'iaped 4o heads-engaging each'in one of the'second n'amed grooves.

10. In amechan ism for'upsetting the ends of rods, a rod clampingdie having'a chambe'r formed therein and op'ening upon the end 0f the die; said chamber extending inward "diver-gently for a-distance and then convergin'g to a diameter equal to that ofthe-opening' of the chamber'and then extending inward with a uniform diameter, thedie being' formed rearward of said chamber to clamp arodextending through the chamber,

1, sleeve mounted within the chamber for longitudinal movement andhaving a bore -slightly 'greaterthan"the diameter 'of the rod to be operated on, and a plurality of segmental jawspivotedto said sleeve for radial movement, said segmental a-ws when extendedparallelto the axis of the'sleeve defining a bore slightlylarger than the rod tobe operated on, and means for causing the divergence of the'jaws as the sleeve is forced 'inward into the chamber, said means acting to support the jaws.

* 11. In a mechanism for upsetting the -ends'of rods, a rodclampingdie having a chamber formed therein, said chamber openingupon theend of the die and extending inward divergently for a' distance and then extending inward convergently for a distance and then having a uniform diameter, rod supporting means disposed- -within"the chamber and movable l0ngitu- "dinally therein and including a plurality of pivoted jaws adapted to move into divergent position as they move toward the rear end of'the chainberyand releasable means for latching said first-named means 1n-1ts fully retracted position.

122 In a -mechanism-for upsettingthe ends "of rods; a rod clamping die having a 1 chamber formed thereinytheside walls of which'extend inward divergently for a distance, and then converge to a diameter equal to that of the opening of the chamber andthen "extend inward with a"uniform diameter, asleeve mounted-in said chamswinging moveme'ntfthe jaws being segmental 1n cross 'sectlon and when dlsposed *in parallel-relationdefining a borefslightly greater than the diameter of the rod to be :op'erated'bn, -the jaws being adapted to bear against the side wall of the chamber as "the sleeve and j'aws are forced inward, and

' means foi latching the sleeve from outward i which extend inward divergently for a dis- 'tance, and then converge to a diameter equal to that of the opening of thechamber and thenextend inward with a uniform diame- 'ter approximately i that of the last-named extension 'of the' chamber, a'pluralityof jaws pii otallymounted on -the sleeve for radial swmgm g movement, thej aws being-segmental -'incross section and when-disposed in parallel-i-elatioirdefining abore slightly greater than thediam'eter of the rod to be-operated on; the jaws being adapted to'bear against the-side wall of the chamber as thesleeve and jaws are forced inward, and means for latching the sleeve from outward movement- 'when the sleevehas been fully forced into -the chamber, sald means including a 'shankhaving a detent, the base-of the die being formed with an opening to-receive said detent, a spring actuated latch mounted ;upon*thedie a'nd-engageablewith said-detent, and a spring" urging {the sleevetowa'rd'the entrance end of the chamber.

14. In a mechanism forupsetting the ends "of rods, a hollow rod clamping die formed ofopposed sections, the sections having 00- acting rod seats,- means for forcing said sec the side face of the rod at all times while i it is being upset and supporting the rod against bending, said means being movable into varying angular relation to the axis of the clamping die, as the rod is upset and radially expanded.

15. In mechanism for upsetting the ends of rods, a hollow rod clamping die formed of opposed sections, said sections having coaoting rod seats, means for forcing said sections toward each other to clamp a rod within said seats, a dolly mounted for reciprocation within the hollow clamping die, means for striking blows upon the dolly, and means disposed within the die engaging the side faces of the rod at all times while it is being upset and supporting the rod against bending, said means being longitudinally movable within the die and having portions thereof radially movable into angular relation to the axis of the die.

16. In mechanism for upsetting the ends of rods, a rod clamping die formed in two coacting sections, said sections being formed to provide a chamber and coacting rod clamping seats, the chamber having inwardly divergent walls for a portion of its length, the walls then converging to a diameter equal to the diameter at the entrance of the chamber and then extending rearwardly for a uniform diameter, and means disposed within the rod clamping die for supporting the rod against bending, said means engaging the side faces of the rod and comprising a sleeve formed of two opposed sections having rod receiving seats and each of said sections of the sleeve being formed with a plurality of radially movable pivoted jaws, the jaws being segmental in cross section and when disposed parallel to the axis of the die defining a bore slightly larger than the rod to be operated on, means operatively engaging the sleeve section with the die for longitudinal movement parallel to the axis of the sleeve, means operatively engaging the free ends of the jaws with the die for movement parallel to the diverging walls of said chamber, a dolly mounted for movement into the open end of the die, means for causing blows to be struck upon the end of the dolly to force it inward, and means for forcing the die sections together into clamping engagement with a rod inserted therethrough, the extremities of the jaws being provided each with a radially extending rib adapted to engage in the radial grooves of the dolly face.

17. In a mechanism for upsetting and radially expanding the ends of rods, a rod clamping member, and means carried by the clamping member engaging the end of the rod to be expanded and supporting said end at all times, said means being movable radially by and with the radial expansion of the rod as its end is upset.

In testimony whereof I hereunto aflix my signature in the presence of two Witnesses.

OSCAR C. JULIEN.

Witnesses:

KNUT Vrrs, W. E. GAUTHIER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

